In this phase, Windows Boot Manager starts the Windows OS Loader (WinLoad.exe). Once this process is completed, the system identifies a valid disk and reads the Master Boot Record (MBR) from it, and the Windows Boot Manager is loaded. In this phase, the computer’s firmware settings are loaded through a power-on self test (POST) process.

Here are the four major phases involved in the boot process: However, when you turn on your computer, these files need to be loaded into memory (RAM) and executed for the OS to load. In any computing device, all the essential files, the operating system, its associated libraries and dependencies, along with system-critical data are stored on a hard disk drive. To boot a computer means to initiate the process of starting it. These applications can also help you flash the device with a new OS image and to capture and save crash dumps along with the associated logs to better understand any Windows issues. Windows Boot manager also lets you choose a specific operating system to load if your system contains multiple operating systems. It can also provide access to several boot applications before loading Windows, which let you update, reset, or format your device. what happens when you first turn on your device. It is loaded from the volume boot code of your device’s hard drive, and it enables you to set up the boot environment, i.e. Windows Boot Manager (Bootmgr.exe) is Microsoft’s proprietary Unified Extensible Firmware Interface (UEFI) application. Fixing Boot Configuration Data (BCD) errors.Repairing the master boot code and boot sector.How to use Windows Boot Manager to fix Windows 10 boot errors.Using the Startup Repair tool to repair the Boot Loader.Most common problems during the Boot Loader phase.Enabling and disabling Windows Boot Manager.

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